Read the Mining Journal article| https://bit.ly/2N3evAx
"What is now Australian miner South32’s Hermosa Project is part of a zoned porphyry copper hosted by Paleozoic metamorphized limestones (meta sediments) that are essentially an extensive zoned skarn deposit and are like the Hay Mountain Deposit as will be shown when the total extents of the Hay Mountain Deposit is drilled. For these reasons, and encouraged by its proximity and subsurface continuity with the nearby Tombstone porphyry copper and precious metal district, also a zoned skarn mineral body, we find that this is simple zoning of the surrounding porphyry copper deposits..." Read more https://www.linkedin.com/pulse/south32-has-completed-us13-billion-acquisition-83-arizona-briscoe/